1901 .] HYMENOPTERA EROM NEW BRITAIN. 227 



with one cubital cellule. Abdomen twice the length of the head 

 and thorax united ; the suturiform articulation is deep ; it is the 

 only transverse furrow, and there are no oblique ones. Hypopygium 

 cultriform, large ; the last segment is well developed above, being 

 about two-thirds of the length of the penultimate. 



The pterostigma is large ; the radius issues from behind its 

 middle ; the sheaths of the ovipositor are slender and not pilose ; 

 the palpi are not densely pilose ; the eyes on the inner side are 

 margined ; the antennal tubercles are distinct ; the scape of the 

 antennae is not very stout -, the 3rd joint is slightly longer than 

 the 4th. The basal three segments of the abdomen are striated, 

 the others smooth and shining ; the penultimate segment is not 

 quite so long as the preceding. Metathoracic spiracles large. 

 Middle lobe of niesonotutn distinctly separated. 



The fact of there being only one — the suturiform — transverse 

 furrow on the abdomen and no oblique ones separates this genus 

 from Iphiaulax, Odontoscajms, Chaolta, and Zaglyptogastra, with 

 which it appears to be most nearly allied otherwise. 



Cratobracon rueicbps, sp. nov. 



Niger; capite Jiavo-rufo ; pro- mesotJioraceque rvfis; pedihus anticis, 

 femorihus tihiisque intermediis rufls ; alls nigro-violaceis, 

 stigmate nervisque nigris. $ . 



Long, 16 ; terehra 24 mm. 



Scape of antennae rufous ; the flagellum covered with a stiff 

 black microscopic down. Head smooth and shining, pale rufous- 

 yellow ; the face below sparsely covered with pale hair ; the 

 mandibular teeth black. Thorax smooth and shining ; the median 

 segment covered with black hair ; its apex in the middle is largely 

 depressed, the depression is narrowed towards the base and apex. 

 The anterior legs bear no black ; the middle pair are black, with 

 the femora and tibise rufous. The petiole is keeled down the 

 middle ; the lateral furrows are wide and deep and are obscurely, 

 irregularly, transversely striated. The second segment has the 

 central region irregularly rugose, the sides longitudinally striated ; 

 the central keel becomes weaker towards the apex; its dilated 

 basal part is small and is minutely striated, on either side of it is 

 a stout oblique keel; the transverse depression is stoutly striated ; 

 the third segment is closely longitudinally striated, the striae are 

 irregular and run into reticulations, the apex is smooth ; the 

 basal half of the 4th is coarsely aciculated ; the basal three 

 segments are for the greater part white. 



Ichneumonid^. 



Ophionini. 



Leptophion, gen. nov. 



Disco-cubital nervure not broken with a stump of a vein ; its 

 middle broadly and roundly carved ; the first abscissa of the radius 

 thickened, the second roundly curved upwards ; the transverse 



